*{
    margin: 0;
    padding: 0;
}
.box{
    width: 1142px;
    /* height: 1200px; */
    margin: 12px auto;
    background-color: lightblue;
}
.titl{
    width: 186px;
    line-height: 24px;
    font-size: 31px;
    color: lightseagreen;
    margin: 24px auto;
}
form{
    margin-left: 72px;
}
form input{
    width: 360px;
    height: 24px;
    margin-bottom: 24px;
}
form input[type="radio"], input[type="checkbox"]{
    /* display: none; */
    width: 36px;
    height: 24px;
    margin-right: 8px;
}
form input[type="radio"]:before{
    content: "";
    display: inline-block;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color:white;
    box-shadow: 0 0 0 4px rgb(255, 255, 255) inset;
    border: 2px solid rgb(253, 243, 243); 
    top: 0;
    left: 5px;
}
form input[type="radio"]:checked:before{
    background-color: red;
}
form input[type="checkbox"]:before{
    content: "";
    display: inline-block;
    width: 50px;
    height: 50px;
    background-image: url("./images/xin.png");
    background-size: 100% 100%;
    position: relative;
    top: -17px;
    left: -6px;
}
form input[type="checkbox"]:checked:before{
    background-image: url("./images/xined.png");

}
.dm{
    width: 50px;
    height: 50px;
    background: #000;
    transition:width 2s;
}
.dm:hover{
    width: 360px;
    height: 240px;
    
}